Multipurpose application wooden kit assembled to cargo box of vehicle and capable of being disassembled

Abstract

To provide a wooden kit capable of being assembled and disassembled, capable of being wholly and partially assembled, and being assembled to a cargo box of a vehicle.SOLUTION: A multipurpose application wooden kit assembled to a cargo box of a vehicle comprises a floor structure, an intermediate structure, or an upper structure. The floor structure, the intermediate structure, and the upper structure respectively have a shape cut out from one rectangular wood material. A member for assembling and configuring the structures comprises a wooden stationary member, thereby eliminating the need of any special tool in assembling and disassembling.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wooden kit that can be assembled into a luggage box of a vehicle, and more particularly to a wooden kit whose constituent parts are cut out from a single rectangular board that can be disassembled, assembled, and assembled into the luggage box according to the intended use. [Background technology]

[0002] Vehicles equipped with luggage compartments may be used for overnight stays during travel, disasters, etc. However, because the floor of a luggage compartment is uneven and not suitable for sleeping, special flooring materials (sheet materials) are commercially available. These flooring materials are used to make the floor of the luggage compartment flat, and most can be removed when not in use.

[0003] Also, shelves are optionally assembled and used to efficiently load goods into shipping boxes. Similarly, display shelves are assembled and used to display goods.

[0004] Furthermore, the use of so-called kitchen cars, which are vehicles equipped with cooking utensils and serve food, is becoming more and more popular. These kitchen cars not only cook food but also serve it to customers. Summary of the Invention [Problem to be solved by the invention]

[0005] Flooring materials for using cargo boxes for overnight stays are easy to install and remove, but because they are used to level the floor of the cargo box, they cannot be used directly for the purposes described below.

[0006] Although shelves for loading products into shipping boxes may be convenient for loading, simply removing the shelves makes it impossible to display the products. For example, there are no small windows for display, making them inconvenient to use.

[0007] The type, content, and quantity of food served by a food truck vary depending on the time of day and location, so the size of the opening provided to customers may not be appropriate. However, the cooking utensils and interior of the food truck are fixed, making it impossible to provide an opening of an appropriate size.

[0008] The present invention has been made to solve the above problems, and aims to provide a wooden kit that can be assembled and disassembled, and that can be assembled in its entirety or in parts, and that can be installed inside the cargo box of a vehicle.

[0009] Another object of the present invention is to provide a wooden kit that can be assembled in a luggage box of a vehicle and that can determine the openings to be provided depending on the products and dishes to be served.

[0010] Yet another object of the present invention is to provide a wooden kit assembled within a vehicle cargo box that can be removed from the vehicle cargo box after use.

[0011] Furthermore, another object of the present invention is to provide a wooden kit that can be divided into a plurality of blocks, and each component of each block can be cut out from a single rectangular board. [Means for solving the problem]

[0012] A multi-purpose kit assembled within the cargo box of a vehicle that accomplishes the above objectives comprises a floor structure, mid-structure, or upper structure. The floor structure is composed of a first floor structure and a second floor structure, the first floor structure being composed of a floor board portion and a front board portion, and the floor board portion having an opening near its front edge. The front plate portion has a protrusion at its upper end that protrudes through the opening, and the protrusion has a hole in the part that protrudes from the opening.The floor plate portion and the front plate portion are fixed together by inserting a T-shaped fixing member with a T-shaped cross section into the hole. The T-shaped fixing member can have other shapes as long as it does not slip out of the hole.

[0013] The second floor structure is composed of a plurality of vertical members and a plurality of horizontal members for assembling in a grid pattern, and upper and lower plate members positioned to sandwich the vertical and horizontal members assembled in a grid pattern from above and below. The horizontal member has a plurality of slits, and the vertical member has a plurality of slits that interlock with the slits of the horizontal member, and when the slits of each member interlock, a grid structure is formed; When an inverted U-shaped member with an inverted cross section and two legs that are positioned to straddle the fixed opening of a vertical or horizontal member is positioned to straddle the fixed opening, these members can be fixed to the plate member by inserting the tips of the legs of the inverted U-shaped member into foot holes in the lower plate member that are located at positions corresponding to the legs of the inverted U-shaped member.

[0014] The floor board portion, front board portion and T-shaped fixing member that make up the first floor structure have shapes that can be cut out from a single piece of rectangular wood, and the multiple vertical members, multiple horizontal members, upper board member, lower board member and inverted U-shaped member that make up the second floor structure have shapes that can be cut out from a single piece of rectangular wood. In order to match the height position of the floor panel portion of the first floor structure with the height position of the upper plate member of the second floor structure, an auxiliary member may be placed below the floor panel portion.

[0015] Of the vertical and horizontal members assembled in a grid pattern, at least the member located at the rear of the vehicle has a convex portion on its upper edge, and the upper plate member has a concave portion on its upper edge that engages with the convex portion, and by engaging the convex portion and the concave portion, the upper plate member and the members assembled in a grid pattern can be fixed together.

[0016] The vehicle includes first and second intermediate structures that are respectively assembled to the upper lateral sides of the second floor structure, and each of the intermediate structures is composed of an intermediate panel having an opening in the center, a pair of intermediate side members located on the front and rear sides of the vehicle that support the intermediate panel from both sides, and an intermediate upper plate member that abuts the upper end of the intermediate panel.

[0017] Each of the pair of intermediate side members has an upper opening at the top, a groove for receiving both side edges of the intermediate panel, and an opening of the intermediate side member within the groove; The intermediate panel has a lower slit at its lower edge that fits into the floor slit at a position corresponding to the floor slit formed in the cross members arranged in a crisscross pattern, and further has intermediate panel convex portions on both side edges that protrude through the openings in the intermediate side members, and the part of the intermediate panel convex portion that protrudes from the intermediate side member opening has a hole, and by inserting an L-shaped member with an L-shaped cross section into the hole, the intermediate panel is supported on both sides by the intermediate side members.

[0018] The upper plate member has a short upper plate member convex portion that protrudes through the upper opening of the intermediate side member located on the rear side of the vehicle, and a long upper member convex portion that passes through the upper opening of the front intermediate side member on the front side of the vehicle and protrudes through one of the multiple openings of the connecting member, and the short upper plate member convex portion has a hole in the part that protrudes from the upper opening of the intermediate side member, and an L-shaped member with an L-shaped cross section is inserted into the hole, and the long upper plate member convex portion passes through one opening of the connecting member and further has holes in the part that protrudes from one opening of the connecting member, and by inserting an L-shaped member with an L-shaped cross section into each of the holes, the intermediate upper plate member is supported from both sides by the intermediate side member.

[0019] The first and second upper structures are assembled to the first and second intermediate structures, respectively, and each of the upper structures has an upper panel, a pair of upper side members that support the upper panel from both sides and have an upper portion that conforms to the ceiling of the vehicle's luggage box and are located on the front and rear sides of the vehicle, an upper upper plate member that abuts the upper end of the upper panel, and an upper lower plate member that abuts the lower end of the upper panel.

[0020] The upper top plate members of the first and second upper structures are connected by a pair of elongated members, which have a shape that conforms to the ceiling of the vehicle's cargo box and further have connecting protrusions that protrude downward at each end. Each of the pair of upper side members has an upper opening at the top and a lower opening at the bottom, and further has grooves to accommodate both side edges of the upper panel, and one of the pair of upper side members located on the rear side of the vehicle has a downward convex portion at its lower end that protrudes downward through an opening provided in the intermediate upper plate member, and there is a hole where the downward convex portion of one of the upper side members protrudes through the opening of the intermediate upper plate member, and by inserting an L-shaped cross-section member into this hole, one of the upper side members is connected to the intermediate upper plate member.

[0021] the upper lower plate member has a short upper plate member protrusion that protrudes through the lower opening of one of the upper side members and a long upper member protrusion that penetrates the other lower opening of the upper side member and protrudes through the other of the plurality of openings of the connecting member; The convex portion of the short upper plate member has a hole in the part that protrudes from the lower opening of the upper side member, and an L-shaped member with an L-shaped cross section is inserted into this hole, and the convex portion of the long upper plate member passes through the other lower opening of the upper side member, and further has holes in the part that protrudes from the other opening of the connecting member, and by inserting an L-shaped member with an L-shaped cross section into each of the holes, the upper lower plate member is supported from both sides by the upper side member.

[0022] The L-shaped member with an L-shaped cross section is for preventing the insertion from falling out after insertion, and may have other shapes.

[0023] the upper plate member has a convex portion of the upper plate member that protrudes through the upper opening of one of the upper side members and a convex portion of the upper plate member that protrudes through the upper opening of the other upper side member, The convex portions of the upper plate members of the first and second upper structures have holes in the portions that protrude from the upper openings of the respective upper side members, and the upper side members are connected to each other by inserting the connecting convex portions of the elongated members into the holes.

[0024] The intermediate panel, intermediate side member, intermediate upper plate member and L-shaped fixing member that constitute each of the first and second intermediate structures have shapes that can be cut out from a single rectangular piece of wood, and the upper panel, upper side member, upper upper plate member, upper lower plate member and L-shaped fixing member that constitute each of the first and second upper structures have shapes that can be cut out from a single rectangular piece of wood. [Effects of the Invention]

[0025] The kit of the present invention includes a floor structure, an intermediate structure, or an upper structure, and can be omitted when the intermediate structure or upper structure is not required, and similarly can be omitted when the upper structure is not required, allowing it to be used according to its purpose. Furthermore, each structure has a shape that can be cut out from a single rectangular piece of wood, making it easy to manufacture and transport. Furthermore, since the components are connected and fixed using wooden fixing members, assembly and disassembly can be carried out without the use of tools. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view of a vehicle (partially omitted so that the interior can be seen) incorporating the assembled kit. [Figure 2] FIG. 2 is an assembly diagram of the floor structures (first floor structure A, second floor structure B), intermediate structure C, and upper structure D. [Figure 3] FIG. 3(a) is an assembly drawing of the first floor structure, and FIG. 3(b) shows that each component part is cut out from a single rectangular wooden board. [Figure 4] FIG. 4(a) is an assembly drawing of the second floor structure, and FIG. 4(b) shows that each component part is cut out from a single rectangular wooden board. [Figure 5] FIG. 5(a) is an assembly drawing of the intermediate structure, and FIG. 5(b) shows that each component part is cut out from a single rectangular wooden board. [Figure 6A]FIG. 6A (a) is a partial perspective view showing assembly to the intermediate side member, (b) is a partial perspective view showing assembly to the connecting member, and (c) is a partial perspective view of the intermediate side member of the first intermediate structure. [Figure 6B] FIG. 6B is a partial perspective view showing the assembly of the intermediate side member, the intermediate panel, and the cover plate of the first intermediate structure. [Figure 7] FIG. 7(a) is an assembly drawing of the superstructure, and FIG. 7(b) shows that each component part is cut out from a single rectangular wooden board. [Figure 8] FIG. 8 is a perspective view showing the assembly of the upper structure. DETAILED DESCRIPTION OF THE INVENTION

[0027] Various features of the present invention will now be described in conjunction with preferred embodiments, which are not intended to be limiting of the present invention, with reference to the drawings, in which like reference numerals may refer to like devices, functions, processes, etc.

[0028] A vehicle incorporating this assembled kit (with some parts omitted to allow the interior to be seen) is shown in Figure 1. As shown in Figure 2, this kit is composed of floor structures (first floor structure A, second floor structure B), an intermediate structure C, and an upper structure D.

[0029] Figure 3(a) shows an exploded view of the first floor structure A, and Figure 3(b) shows that each component is cut out from a single rectangular piece of wood. (Figure 2 shows the assembled first floor structure.) As shown in Figure 3(a), the first floor structure consists of a component floor plate section and a front plate section, which have symmetrical configurations, so one side will be explained. The floor member 10 is a flat plate material, and has a rectangular opening 11 near the front. The front plate section 12 has the same width as the floor member 10, and a protrusion 13 that protrudes upward is formed on the upper edge at a position corresponding to the opening 11.

[0030] This protrusion 13 has a hole 14 in the part that passes through the opening 11 and protrudes upward. As shown in Figure 3(a), the protrusion 13 is inserted from below through the opening 11 so that it protrudes. Then, a fixing member 15 with a T-shaped cross section is inserted from the outside into the hole 14 exposed from the opening 11. In this way, the floor member 10 and the front panel 12 are fixed at a right angle to each other without using any fasteners such as metal fittings.

[0031] In the figure, two sets of floor members and front plate sections are shown, but it is also possible to configure it with one floor plate section and one front plate section. Conversely, it is also possible to configure it with three or more sets of floor sections and front plate sections. However, for ease of assembly and disassembly, it is preferable to configure it with two sets as shown in the figure.

[0032] Figure 4(a) shows an exploded view of the second floor structure B, and Figure 4(b) shows that each component part is cut out from a single rectangular piece of wood. The second floor structure B is composed of horizontal members 21, vertical members 22, upper members 24, and lower members 25. The horizontal members 21 have multiple slits 21a, and the vertical members 22 have multiple slits 22b that interlock with the slits 21a. When the slits of each member interlock, a grid-like structure is formed (see Figure 2). This grid-like structure can support a load from above.

[0033] At least one of the horizontal members 21 has a plurality of openings 21b for fastening. When an inverted U-shaped member 26 having two legs and an inverted cross section is positioned so as to straddle opening 21b, and the tips of the legs of inverted U-shaped member 26 are inserted into leg holes 25a located on lower plate member 25 at positions corresponding to the legs of inverted U-shaped member 26, horizontal plate member 21, i.e., the grid-like structure, is fastened to lower plate member 25.

[0034] Among the horizontal members, a member 21 located at the rear (behind the luggage box of the vehicle) has a plurality of protrusions 21T formed thereon. A plurality of recesses 24a are formed on the rear edge of the upper plate member 24. When these protrusions 21T and recesses 24a are engaged with each other, the upper plate member 24 is fixed to the members assembled in a grid pattern. In FIG. 4, the upper plate member is made up of two pieces, but it may be made up of one piece, or conversely, it may be made up of three or more pieces.

[0035] Figure 2 shows the first floor structure and the second floor structure assembled together, but if the heights of the respective floor structures do not match, an auxiliary member (a box in Figure 2) may be placed.

[0036] As described above, the first and second floor structures are assembled to the packing box, so that the packing box can be used for overnight stays. After the overnight stay is completed, the floor structures are disassembled, and the packing box can be used for normal use.

[0037] As shown in Figure 4(b), the floor board, front board, and T-shaped fixing member that make up the first floor structure are cut out from a single rectangular piece of wood, and the multiple vertical members, the multiple horizontal members, upper board, lower board, and inverted U-shaped member that make up the second floor structure can be cut out from a single rectangular piece of wood. This improves the productivity of floor structures by determining the shape of each component.

[0038] An intermediate structure C can be attached to the second floor structure (Fig. 2). This intermediate structure C uses a panel with an opening, through which products can be offered and displayed in a way that makes them easy to see.

[0039] The first intermediate structure 30 and the second intermediate structure 80 are assembled to the upper side of the second floor structure B. Fig. 5(a) shows an assembly diagram of each intermediate structure, and Fig. 5(b) shows that each component is cut out from a single rectangular piece of wood. Fig. 6A(a) is a partial explanatory diagram showing the connection between the intermediate side member, intermediate panel, and intermediate top plate member, Fig. 6A(b) is a partial diagram showing the long protrusions, connecting members, and fixing members, and Fig. 6A(c) shows the state in which the intermediate top plate member and intermediate panel are fixed to the intermediate side member with the fixing members.

[0040] The intermediate structure 30 is composed of an intermediate panel 31 having an opening 32 in the center, a pair of intermediate side members 40, 40' that support the intermediate panel from both sides, an intermediate upper plate member 50, and an intermediate lower plate member 60. Products can be placed through the opening 32 provided in the center of the intermediate panel 31, and the products can also be viewed from outside.

[0041] The intermediate panel 31 has a lower slit 33 formed on its lower edge at a position corresponding to the floor slit 21a' formed in the cross members 21 assembled in a grid pattern, and the lower slit 33 fits into the floor slit 21a'. Furthermore, the intermediate panel 31 has intermediate panel protrusions 34, 34' that protrude from both side edges.

[0042] A pair of intermediate side members 40, 40' that support the intermediate panel 31 from both sides are formed with vertical grooves 41 (41') that accommodate both side edges of the intermediate panel 31 (see (a) of FIG. 6A and FIG. 6B). Openings 42, 42' through which the intermediate panel protrusions 34, 34' pass are formed in the vertical grooves 41 (41') (see (a) of FIG. 6A and FIG. 6B).

[0043] The intermediate upper plate member 50 that constitutes the intermediate structure C is assembled so as to abut against the upper edge of the intermediate panel 31, and has a long protrusion 51 that protrudes toward the front side of the vehicle of the intermediate upper plate member 50, and has a protrusion 51' that protrudes toward the rear side of the vehicle.

[0044] Openings 44, 44' through which the protrusions 51, 51' pass, respectively, are formed in the intermediate side member 41 on the front side of the vehicle.

[0045] In the present invention, although not essential, an intermediate lower plate member 60 can be provided. Slits 61, 61' are formed on both sides of this intermediate lower plate member 60 so that it can be fitted onto the edges of the opening 31 of the intermediate panel 31 for attachment. Horizontal grooves 45 (45') that accommodate the edges of both sides of the intermediate lower plate member are formed in the intermediate side member 40 (40').

[0046] The slits 61, 61' of the intermediate lower plate member 60 are engaged with the edges of the opening 31, and both edges of the intermediate panel 31 are inserted into the groove 41 (41') and both edges of the intermediate lower plate member 60 are inserted into the groove 45 (45') so that the intermediate side members 40, 40' can support the integrated intermediate panel 31 from both sides.Then, the protrusions 34, 34' of the intermediate side members are inserted into the openings 42, 42', and further, the protrusions 51, 51' of the intermediate upper plate member are inserted into the openings 44, 44'.

[0047] Holes 34a, 34'a, 51a are exposed in the projections 34, 34', 51' protruding from the openings 42, 42', 44', respectively, and fixing is performed by inserting fixing members 34b, 34'b, 44b having an L-shaped cross section into these holes.

[0048] The protrusion 51 protruding from the opening 44 is long and protrudes through an opening 58a of a connecting member 58 having multiple openings. Holes 34a, 34'a, and 51a are exposed in the protrusion 51, respectively, and fixing is performed by inserting a fixing member 51 with an L-shaped cross section into these holes.

[0049] The first intermediate structure (see Figure 2C), in which both intermediate side members 40, 40', the intermediate upper plate member 50, and the intermediate lower plate member 60 are assembled to the intermediate plate 31, is fixed to the second floor structure (see Figure 2B) so that the slits 33 and 22b engage with each other.

[0050] When it is necessary to open or close the opening 32 in the intermediate panel, as shown in Figure 6, shaft members 32A and 32B are connected to engage with slits provided in protrusions 32a and 32b provided on both upper ends of a cover plate 32L having approximately the same size as the opening 32. The tips of the shaft members 32A and 32B are inserted into holes 32' (32") that rotatably accommodate them. The cover plate 32L then becomes rotatable, allowing the opening 32 to be opened and closed. Note that when the protrusions 32a and 32b function as the rotation axis, the shaft members may be omitted.

[0051] The intermediate panel 81, intermediate side members 82, 82', and intermediate upper plate member 90 that constitute the second intermediate structure 80 have the same structure as the intermediate panel 31, intermediate side members 40, 40', and intermediate upper plate member 50 of the first intermediate structure 30, respectively, and are connected in the same manner, so we will omit explanations and focus on the differences.

[0052] The intermediate panel 81 also has an opening 83, but it is smaller than the opening 32, and the configuration for opening and closing this opening 83 differs from that of the first intermediate structure 30. Both ends of parallel support plates 84A and 84B are fitted and fixed to the upper and lower sides of the opening 83 in grooves 85 (85') and 86 (86') formed in the intermediate side members 82 and 82'. Support members 84C and 84D are assembled between the support members 84A and 84B. Furthermore, a member 87 is attached to a lid plate 86 that opens and closes the opening 83. The member 87 is rotatably attached between the support members 84C and 84D. This allows the lid plate 86 to be opened and closed freely.

[0053] A second intermediate structure (see Figure 2C) in which both intermediate side members 82, 82' and an intermediate top plate member 80 are assembled to an intermediate plate 81 is fixed to a second floor structure (see Figure 2B) so that slit 81' and slit 22b engage with each other.

[0054] The first upper structure 100 and the second upper structure 150, which will become the upper structure D, are assembled on top of the first intermediate structure 30 and the second intermediate structure 80 (Fig. 7). Fig. 7(a) shows an exploded view of each upper structure, and Fig. 7(b) shows that each component part is cut out from a single rectangular wooden board.

[0055] The upper structure 100 is composed of an upper panel 101 having an opening 102 in the center, a pair of upper side members 104, 104' that support the upper panel from both sides, an upper upper plate member 105, and an upper lower plate member 106. Products can be provided through an opening 103 provided in the center of the upper panel 102, and the products can also be viewed from outside.

[0056] The upper portions of the pair of upper side members 104, 104' that support the upper panel 101 from both sides have a curved shape that fits the shape of the interior of the vehicle's cargo box. Vertical grooves 105 (105') are formed to accommodate the side edges of the upper panel 101. Furthermore, a protrusion 104' is provided at the lower end of the upper side member 104' on the rear side of the vehicle, and this protrusion 104' is inserted into an opening 50' provided in the intermediate upper plate member 50.

[0057] The upper plate member 106 that constitutes the upper structure D is assembled so as to abut against the upper edge of the upper panel 101, and has protruding convex portions 106a and 106b (two on each side in the figure) on both sides of the upper plate member 106.

[0058] The upper side members 104, 104' are formed with openings 106a', 106b' through which the protrusions 106a, 106b pass, respectively.

[0059] The upper lower plate member 107 that constitutes the upper structure D is assembled so as to abut against the lower edge of the upper panel 101, and has a long protrusion 107a that protrudes toward the front of the vehicle and a protrusion 107b that protrudes toward the rear of the vehicle.

[0060] The upper side members 104 and 104' are formed with openings 107a' and 107b' through which the protrusions 107a and 107b pass, respectively.

[0061] Although not essential to the present invention, for reinforcement purposes, an upper support member 110 is placed on the upper top plate member 106. Protrusions are provided on both sides of the upper support member 110, and the upper support member 110 is assembled by inserting it into openings provided in the upper side members 104, 104'.

[0062] In order to enable the upper side members 105, 105' to support the upper panel 101 from both sides, both edges of the intermediate panel 101 are inserted into the groove 105 (105'), the convex portions 107a, 107b of the upper lower plate member 107 are inserted into the openings 107a', 107b', and further, the convex portions 106a, 106b of the upper upper plate member are inserted into the openings 106a', 106b'.

[0063] A hole 107b'' is exposed in the protrusion 107b protruding from the opening 107b', and fixing is achieved by inserting a fixing member 51b' with an L-shaped cross section into this hole. Fixing is also achieved by inserting a fixing member 104'c with an L-shaped cross section into a hole 104'a in the protrusion 104' that protrudes through the opening 50' of the intermediate top plate member 50. As a result, the first upper structure 100 is fixed to the first intermediate structure 30.

[0064] The upper panel 151, upper side members 152, 152', and upper top plate member 153 that make up the second upper structure 150 have the same structure as the upper panel 101, upper side members 140, 140', and upper top plate member 106 of the first upper structure 100, respectively, and are joined in the same manner, so explanations thereof will be omitted.

[0065] The fixed first upper structure 100 and second upper structure 150 are connected by a pair of elongated members 160a, 160b, which are shaped to fit the roof of the vehicle's luggage box. Each member has a downwardly facing connecting protrusion 161 at its end. Holes 106a', 106b', 153a', 153b' are provided in the protrusions 106a, 106b, 153a, 153b of the upper top plate members of the first and second upper structures, protruding from the upper openings of the upper side members, and the two upper structures are connected to each other by inserting connecting recesses 162 vertically from above into the corresponding holes. To prevent the elongated member from coming off the upper side member, an L-shaped fixing member 163 can be inserted through horizontal holes 162, 163' (as shown, the holes in the elongated member are provided at both ends of the elongated member at positions in the upper side member that correspond to the holes).

[0066] It will be apparent to those skilled in the art that many different modifications can be made without departing from the spirit and scope of the present invention. Therefore, it should be understood that the embodiments of the present invention are illustrative only and do not limit the scope of the present invention. [Explanation of symbols]

[0067] A. First floor structure B Second floor structure C intermediate structure 30 First intermediate structure 80 Second intermediate structure D. Superstructure 100 First Superstructure 159 Second Superstructure

Claims

1. A multi-purpose kit that is installed in a luggage compartment of a vehicle, The system is composed of a first floor structure and a second floor structure, the first floor structure comprises a floor board portion and a front board portion, The floor plate portion has an opening near a front edge, The front plate portion has a protrusion at its upper end that protrudes through the opening, and a hole is formed in the portion of the protrusion that protrudes from the opening, and the floor plate portion and the front plate portion are fixed together by inserting a T-shaped fixing member having a T-shaped cross section into the hole, the second floor structure is composed of a plurality of vertical members and a plurality of horizontal members for assembling in a grid pattern, and upper plate members and lower plate members positioned so as to sandwich the vertical members and horizontal members to be assembled in a grid pattern from above and below, the horizontal member has a plurality of slits, the vertical member has a plurality of slits that interlock with the slits of the horizontal member, and when the slits of each member interlock with each other, a grid structure is formed; When an inverted U-shaped member having an inverted cross section and two legs arranged to straddle the fixing opening of the vertical member or the horizontal member is arranged to straddle the fixing opening, the ends of the legs of the inverted U-shaped member are inserted into leg holes in the lower plate member at positions corresponding to the legs of the inverted U-shaped member, thereby fixing the member to the plate member. A kit characterized by:

2. the floor board portion, the front board portion, and the T-shaped fixing member that constitute the first floor structure are cut out from a single rectangular piece of wood, The plurality of vertical members, the plurality of horizontal members, the upper plate member, the lower plate member, and the inverted U-shaped member that constitute the second floor structure are cut out from a single rectangular piece of wood. The kit of claim 1 .

3. 2. The kit according to claim 1, wherein an auxiliary member is placed under the floor board portion to match the height position of the floor board portion of the first floor structure with the height position of the upper plate member of the second floor structure.

4. At least the rearmost one of the vertical and horizontal members assembled in a grid pattern has a convex portion on its upper edge, The upper plate member has a recess that engages with the protrusion on an upper edge thereof, The upper plate member and the members assembled in a grid pattern are fixed together by engaging the convex portion and the concave portion. The kit of claim 1.

5. first and second intermediate structures respectively assembled to the upper sides of the second floor structure; Each of the intermediate structures comprises: an intermediate panel having a central opening; a pair of intermediate side members positioned at the front and rear of the vehicle and supporting the intermediate panel from both sides; an intermediate upper plate member abutting against the upper end of the intermediate panel; It consists of Each of the pair of intermediate side members has an upper opening at an upper portion thereof, and further has grooves for receiving both side edges of the intermediate panel, and an opening of the intermediate side member within the grooves. The intermediate panel has a lower slit at its lower edge that fits into the floor slit at a position corresponding to the floor slit formed in the cross members assembled in the grid pattern, and further has intermediate panel protrusions on both side edges that protrude through the openings of the intermediate side members, and the intermediate panel protrusions have holes in the parts that protrude from the openings of the intermediate side members, and by inserting L-shaped members with an L-shaped cross section into the holes, the intermediate panel is supported from both sides by the intermediate side members, the upper plate member has a short upper plate member protrusion that passes through the upper opening of the intermediate side member located on the rear side of the vehicle and protrudes, and a long upper member protrusion that passes through the upper opening of the front intermediate side member on the front side of the vehicle and protrudes through one of the plurality of openings of the connecting member, The short upper plate member protrusion has a hole at the portion protruding from the upper opening of the intermediate side member, and an L-shaped member having an L-shaped cross section is inserted into the hole, and the long upper plate member protrusion passes through one opening of the connecting member, and further has holes at the portion protruding from one opening of the connecting member, and an L-shaped member having an L-shaped cross section is inserted into each of the holes, so that the intermediate upper plate member is supported from both sides by the intermediate side member. The kit of claim 1.

6. first and second upper structures assembled to the first and second intermediate structures, respectively; Each of the superstructures comprises: The top panel and a pair of upper side members positioned at the front and rear of the vehicle, the upper side members supporting the upper panel from both sides and having an upper portion shaped to fit the ceiling of the luggage box of the vehicle; an upper plate member that abuts against the upper end of the upper panel; an upper lower plate member that abuts against the lower end of the upper panel; and the upper top plate members of the first and second upper structures are connected by a pair of elongated members, the elongated members having a shape that conforms to the ceiling of the luggage box of the vehicle, and further having connecting protrusions that protrude downward at each end; Each of the pair of upper side members has an upper opening at the top and a lower opening at the bottom, and further has grooves for receiving both side edges of the upper panel, one of the pair of upper side members located on the rear side of the vehicle has a downward convex portion at its lower end that protrudes downward through the opening provided in the intermediate upper plate member, a hole is formed in a portion of one of the lower protrusions of the upper side member that protrudes through the opening of the intermediate upper plate member, and an L-shaped cross-section member is inserted into the hole to connect one of the upper side members to the intermediate upper plate member; the upper lower plate member has a short upper plate member protrusion that passes through the lower opening of one of the upper side members and a long upper member protrusion that passes through the other lower opening of the upper side member and passes through the other of the plurality of openings of the connecting member, The convex portion of the short upper plate member has a hole in the portion that protrudes from the lower opening of the upper side member, and an L-shaped member having an L-shaped cross section is inserted into the hole, and the convex portion of the long upper plate member passes through the other lower opening of the upper side member and further has holes in the portion that protrudes from the other opening of the connecting member, and by inserting an L-shaped member having an L-shaped cross section into each of the holes, the upper lower plate member is supported from both sides by the upper side member, the upper plate member has a convex portion that protrudes through the upper opening of one of the upper side members and a convex portion that protrudes through the upper opening of the other upper side member, a hole is formed in the protruding portion of each of the upper plate members of the first and second upper structures, the protruding portion protruding from the upper opening of each of the upper side members, and the upper side members are connected to each other by inserting the connecting protrusion of the elongated member into the hole; The kit of claim 5.

7. 6. The kit according to claim 5, wherein the intermediate panel, the intermediate side member, the intermediate top plate member and the L-shaped fixing member that constitute each of the first and second intermediate structures are cut out from a single rectangular piece of wood.

8. 7. The kit according to claim 6, wherein the upper panel, the upper side member, the upper upper plate member, the upper lower plate member and the L-shaped fixing member that constitute each of the first and second upper structures are cut out from a single rectangular piece of wood.

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